基于DSP和CPLD的双输出双级矩阵变换器研究

Research on Dual Output Two-stage Matrix Converter Based on DSP+CPLD

双输出双级矩阵变换器(DO-TSMC)由整流级和五桥臂逆变级组成,其结构简单、功率密度高,能够独立地驱动两个三相负载,但其调制策略所需的驱动信号多,在片内脉宽调制(PWM)资源有限的数字信号处理器(DSP)中实现起来较困难。为解决该问题,提出了一种PWM分时复用的双空间矢量调制实现方法,仿真和实验结果验证了该调制策略的有效性和可行性。

The dual output two-stage matrix converter（DO-TSMC） consists of a rectifier stage and a five-leg inverter stage.The proposed topology has some attractive features such as high power density, simple structure and outputting two three-phase voltages independently.However it is different to realize the space vector modulation by general digtal signal processor（DSP） due to the numerous pulse width modulation （PWM） signal.So a PWM of time division multiplexing is proposed,which is easily implemented by general.Finally ,the modulation is verified by experimental results.